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Angular asymmetry and attosecond time delay from the giant plasmon resonance in C-60 photoionization
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2015 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 91, no 3, 033413Article in journal (Refereed) Published
Abstract [en]

This combined experimental and theoretical study demonstrates that the surface plasmon resonance in C-60 alters the valence photoemission quantum phase, resulting in strong effects in the photoelectron angular distribution and emission time delay. Electron momentum imaging spectroscopy is used to measure the photoelectron angular distribution asymmetry parameter that agrees well with our calculations from the time-dependent local density approximation (TDLDA). Significant structure in the valence photoemission time delay is simultaneously calculated by TDLDA over the plasmon active energies. Results reveal a unified spatial and temporal asymmetry pattern driven by the plasmon resonance and offer a sensitive probe of electron correlation. A semiclassical approach facilitates further insights into this link that can be generalized and applied to other molecular systems and nanometer-sized metallic materials exhibiting plasmon resonances.

Place, publisher, year, edition, pages
2015. Vol. 91, no 3, 033413
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Physical Sciences
URN: urn:nbn:se:su:diva-116988DOI: 10.1103/PhysRevA.91.033413ISI: 000351769400008OAI: diva2:812075


Available from: 2015-05-15 Created: 2015-05-05 Last updated: 2015-05-15Bibliographically approved

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Dahlström, J. Marcus
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Department of Physics
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